Improvement in tuyeres



F. mam & HQVFRANCK.

Tuyeres.

Patented May 11,1875.

N0. I63,2H.

FIG-1'.

INVENTORS:

ATTIST:

THE GRAPHIC CO. PHOTO -LITH.39 5.41 PARK PLACE, NY.

UNITED STATES PATENT QFFIC'E.

FRANZ KREIN AND HENRY FBANCK, OF ST. LOUIS, MISSOURI.

IMPROVEMENT IN TUYERES.

Specification forming part of Letters Patent No. 163,211, dated May 11,1875; application filed April 23, 1875.

To all whom it may concern:

Be it known that we, FRANZ KREIN and HENRY FRANOK, both of St. Louis,St. Louis county, State. of Missouri, have invented a certain new anduseful Improvement in Blacksmiths Tuyeres, of which the following is aspecification This improvementconsists of a casting which constitutesnot only the tuyere proper, but also the walls of the fire-place, so asto dispense with the usual brick walls inelosin g said fireplace. Saidwall-casting is made rectangular, and the air circulates around inside,so as to keep it cool and prevent rapid injury from heat. Thiscirculation alsoheats the air. After the air has passed through thechamber in the walls it enters an inner annular chamber, and passes upthrough an annular opening into the fire. The inner sides of theinnerannular chamber and said annular escape opening are formed by a movableplug, which is sustained by a weighted lever, and which maybe lowered byraising the weighted end of the lever so as to remove any deposit fromthe blast opening or from the inner annular chamber.

In the drawings, Figure l is a perspective view with parts removed. Fig.2 is a view half in horizontal section and half in plan. Fig. 3 is asect-i011 at line a 00.

A is a rectangular tuyere-casting formed hollow, with an interiorpassage or chamber, B, into which the air enters through nozzle 0,connected to the pipe of the blower or bellows, the air passing aroundthrough the passage B to the wall or end I), by which it is deflectedthrough duct (Z into the interior annular chamber l). Beneath thefire-place the air enters the chamber D in a radial direction, andescapes from said chamber through an annular opening, 0, into the bottomof the fire. E is a plug or valve forming the inner side of the chamberD, and of the opening 0; and it is held centrally in said opening byribs or lugs a, cast upon the plug or the main casting, as shown. Theplug E is supported on a weighted lever, F, pix'oted at f, so that byraising the weighted end of the lever the plug may be drawn down so asto clear the annular openin g c or the chamber D from cinders or otherdeposit. The bottom G of the fire-place has an annular depression, whichfavors the form ation of clinkers in the form of a ring, that can bereadily lifted out by a poker.

By the use of the air-passage B the walls A of the casting A are keptcool, and constitute the sides of the fire-place, and the air is at thesame time heated, so as to supply a heated blast to the fire. Thisfeature of forming the walls of the fire-place of hollow metal in placeof bricks is of great value for two reasons: first, when the walls areformed of fire-brick (as is the usual practice) the cavity becomesrapidly enlarged by the disintegration of the bricks at the sides, andthe consumption of coal is increased without any advantage resultingfrom such increase; second, the brick hearths are so destroyed after oneor two weeks constant use that it is requisite that they should be builtanew, involving loss of time, expense, and hinderance to business.

WVe claim as our invention- 1. The tuyere A, formed with hollow walls A,with interior air-passage B, and constitutin g the walls of thefire-place, and combined with interior annular chamber 1) and opening 0,substantially as set forth.

2. The combination of hollow walls A, passage B, chamber D,blast-opening e, and dropplug E, all substantially as set forth.

FRANZ KREIN. HENRY FRANOK. Witnesses:

SAML. KNIGHT, 011s. STUBENRAUGK.

